Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) says: By the One besides whom there is no god, I have not seen anyone to whom those who speak with affectation were more displeasing than the Prophet (peace and blessings be upon him), nor have I seen anyone after the Prophet (peace and blessings be upon him) harsher toward such people than Sayyiduna Abu Bakr (may Allah be pleased with him). And my opinion of Sayyiduna Umar (may Allah be pleased with him) is that he was the harshest of all the people of the earth, because he feared for such people. Here the narrator is in doubt about one word.
Abu Ya'la and al-Tabarani recorded it, and the narrators of both are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الزهد / 17839